García-Lomas, José Ignacio - Reseña Inventario de Marcas, Sellos, Pruebas y Enteros Postales de Puerto Rico
(Como Dependencia Postal Española)Publisher: Hobby, Madrid, 1977.
Hardback, dustwrapper, illustrated, 255 pages, text in Spanish, dustwrapper chipped at edges with loss of tiny fragments, obvious spine-lean, a Good working copy.
Important handbook. Very well illustrated in black & white.